After some investigation of the H/T method myself by way of the Pope vid and Tim's WFD vid (and others circulating on YouTube), I'm currently unable to do it with my current DW pedal. I have a size 11 foot, and even at an angle I cannot get enough leverage to properly execute the heel stroke. I'll have to wait until I get a longboard.

For the time being, I'm using the Steve Smith "controlled release" approach, which Pope also describes. It's not quite H/T, but it is the natural motion for accenting a downstroke or first note of a double, etc. In fact, I find that it's the obvious motion to make for playing first note accents, which helps for dynamic bass drum playing (I'm currently only using single pedal). It ends up mirroring the motion of the hands... almost the Moeller technique for the feet (whereas H/T might be the feet equivalent of the freehand technique). For controlled release, the toes essentially stay on the footboard, in a "resting" position as the leg drops for the first accented note (which I find to almost be a "flat" stroke). I've seen exercises for this that notate "L" for leg stroke and "U" or "T" for heel up/toe stroke.